System and method for developing test cases using a test object library

ABSTRACT

A method, apparatus, article of manufacture, and a memory structure for generating a test code for an automatic procedure is disclosed. The method comprises the steps of defining a source file having a plurality of tags associated with a member of a library of executable code objects defining a set of instructions for performing a portion of the automatic test procedure, generating a test plan in a conventional language from the source file, and generating an automated test code for the automated test procedure from the source file. In one embodiment, a test index identifying system elements tested by the test code is generated and incorporated into the test plan, allowing the user to verify that all desired system elements are exercised by the automated test code. The article of manufacture comprises a data storage device tangibly embodying instructions to perform the method steps described above. The apparatus comprises means for defining a source file having a plurality of tags, wherein each tag is associated with a member of a library of executable code objects defining a set of instructions for performing a portion of an automatic test procedure, means for generating a test plan in a conversational language from the source file, and means for generating an automated test code for the automatic test procedure from the source file.

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is related to the following co-pending and commonly assigned patent application, which application are incorporated by reference herein:

[0002] Application Ser. No. ______, entitled “GRAPHICAL USER INTERFACE FOR DEVELOPING TEST CASES USING A TEST OBJECT LIBRARY,” filed on same date herewith, by Thomas J. Pavela, attorney's docket number ST9-98-108.

BACKGROUND OF THE INVENTION

[0003] 1. Field of the Invention

[0004] The present invention relates to systems and methods of generating test cases, and in particular to a method and system for generating test cases using a test object library.

[0005] 2. Description of the Related Art

[0006] The past two decades have seen a rapid proliferation of computer application programs. To be competitive, software applications must be responsive to customer's rapidly evolving needs, and must be as bug-free as possible. One method of assuring that a software release is bug free by testing the software with a wide variety of test cases, carefully chosen to test all critical modules in the software product. Such testing procedures are especially important where the software under test is designed to operate across a number of processors or other systems operating in parallel. In such cases, the individuals writing the test cases should be familiar the operating system, communication protocols for all of the elements in the system, but unfortunately, there are few individuals with all of the skills necessary to write a complete test program.

[0007] The development and execution of software test cases also takes an large investment of time and resources, and can delay the timely introduction of a software product to the marketplace. Because software applications are written and sold in a highly competitive environment, there is an urgent need to reduce the cost and time involved in testing software.

[0008] Typically, the process of developing software test procedures begins with the generation of a test plan with test objectives and procedures. That test plan is published and subject to review. If the test plan is approved, detailed automated test code is written. Invariably, the test code does not function as desired, and changes must be made to the code, often implicating major changes in the test plan as well. However, in the rush to bring the software product to market, it often occurs that the test plan is never updated to reflect the new test procedures. Even if the exigencies of the situation permit the test plan to be updated, this effort usually involves a significant amount of time and money.

[0009] What is needed is an improved system and method for developing test cases. The present invention satisfies that need by offering a system that relieves the system test designer from writing the automated code from scratch. Instead, the test designer is provided with a library of test objects, each implementing a portion of the automated test procedure. When one of the objects in the library are selected, the user is prompted to select from test object options that define required test parameters, thus simplifying the process. The system and method for developing test cases also relieves the test case designer from the burden of familiarizing themselves with the protocols and interoperability requirement for each and every system element used by the software, and allows the test plan to be updated and documented with significantly less effort.

SUMMARY OF THE INVENTION

[0010] To address the requirements described above, the present invention discloses a method, apparatus, article of manufacture, for generating a test code for an automatic procedure.

[0011] The method comprises the steps of defining a source file having a plurality of tags associated with a member of a library of executable code objects defining a set of instructions for performing a portion of the automatic test procedure, generating a test plan in a conventional language from the source file, and generating an automated test code for the automated test procedure from the source file. In one embodiment, a test index identifying system elements tested by the test code is generated and incorporated into the test plan, allowing the user to verify that all desired system elements are exercised by the automated test code. Automated test code is generated using a technique wherein commands to the system elements are issued and messages responsive to the commands are intercepted and used to provide test status and error messages. The article of manufacture comprises a data storage device tangibly embodying instructions to perform the method steps described above.

[0012] The apparatus comprises means for defining a source file having a plurality of tags, wherein each tag is associated with a member of a library of executable code objects defining a set of instructions for performing a portion of an automatic test procedure, means for generating a test plan in a conversational language from the source file, and means for generating an automated test code for the automatic test procedure from the source file.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Referring now to the drawings in which like reference numbers represent corresponding parts throughout:

[0014]FIG. 1 is a block diagram showing an exemplary hardware environment for practicing the present invention;

[0015]FIG. 2 is a flow chart presenting an overview of the process steps used to practice one embodiment of the present invention;

[0016]FIG. 3 is a flow diagram providing additional detail regarding the operations described in FIG. 2;

[0017]FIG. 4 is a diagram showing an illustrative embodiment of a template for the script file;

[0018]FIG. 5 is an example of a script file template after the test purpose and the test scenario have been inserted into the source file by the user;

[0019]FIG. 6 is an example of a source file template after a plurality of test procedure commands have been inserted into the source file template;

[0020]FIG. 7 is a flow chart showing an illustrative example of process steps used to generate the test plan from the source file;

[0021]FIGS. 8A and 8B are diagrams showing a test plan generated from the source file shown in FIG. 6;

[0022] FIGS. 9A-9F are diagrams showing a listing of an automated test code generated from the script file shown in FIG. 6;

[0023]FIG. 10 is a flow chart presenting an overview of the operations used to generate a source file using the test case GUI;

[0024]FIG. 11 is a diagram of a start-up window for the test case GUI;

[0025]FIG. 12 is a diagram of one embodiment of the appearance of the test case GUI prompting the user to provide a test case name and a test case description;

[0026]FIG. 13 is a diagram of the appearance of one embodiment of the test case GUI, prompting the user to select a configuration (environment);

[0027]FIG. 14 is a diagram showing an exemplary example of the test case GUI prompting the user to enter a step-by-step scenario description;

[0028]FIG. 15 is a diagram showing an example of how the test case GUI prompts the test designer to enter an author name;

[0029]FIG. 16 is a diagram showing an exemplary test case GUI prompting the user to select a test configuration;

[0030]FIG. 17 is a diagram showing an exemplary test case GUI prompting the user to select among RECON initialization options;

[0031]FIG. 18 is a diagram showing an exemplary test case GUI prompting the user to select database types for the test case;

[0032]FIG. 19 is a diagram showing an exemplary test case GUI prompting the user to select which databases to load for the test case;

[0033]FIG. 20 is a diagram showing an exemplary test case GUI prompting the user to select among IRLM options;

[0034]FIG. 21 is a diagram showing an exemplary test case GUI prompting the user to enter test procedure commands.

[0035]FIG. 22 is a diagram showing the test case GUI after the user has selected an icon to show the library member objects categorized under the coupling facility category;

[0036]FIG. 23 is a diagram showing the test case GUI after the user has selected the “CF Link Failure Recovery” library member object in FIG. 22;

[0037]FIG. 24 is a diagram showing how the test case GUI can be used to reverse-parse commands in the source file;

[0038]FIG. 25 is a diagram showing the test case GUI after a change in the configuration from a one-way configuration to a six-way configuration;

[0039]FIG. 26 is a diagram showing another embodiment of the test case GUI;

[0040]FIG. 27 is a diagram showing the test case GUI showing another embodiment of the “Set up a live terminal” window;

[0041]FIG. 28 is a diagram showing the test case GUI after the user has selected an object in the source code having a parameter error for reverse parsing;

[0042]FIG. 29 is a diagram showing the test case GUI presenting an IRLM object window;

[0043]FIGS. 30A and 30B are representative code instructions for a script macro;

[0044]FIG. 31 presents an example of software code used to translate a test object into test code; and

[0045] FIGS. 32A-C presents an example of subroutine in the automated executable subroutine library, which may be called by the test code.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

[0046] In the following description, reference is made to the accompanying drawings which form a part hereof, and which is shown, by way of illustration, several embodiments of the present invention. It is understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present invention.

Hardware Environment

[0047]FIG. 1 illustrates an exemplary computer system 100 that could be used to implement the present invention. The computer 102 comprises a processor 104 and a memory, such as random access memory (RAM) 106. The computer 102 is operatively coupled to a display 122, which presents images such as windows to the user on a graphical user interface 118B. The computer 102 may be coupled to other devices, such as a keyboard 114, a mouse device 116, a printer, etc. Of course, those skilled in the art will recognize that any combination of the above components, or any number of different components, peripherals, and other devices, may be used with the computer 102.

[0048] Generally, the computer 102 operates under control of an operating system 108 stored in the memory 106, and interfaces with the user to accept inputs and commands and to present results through a graphical user interface (GUI) module 118A. Although the GUI module 118A is depicted as a separate module, the instructions performing the GUI functions can be resident or distributed in the operating system 108, the application program 110, or implemented with special purpose memory and processors. The computer 102 also implements a compiler 112 which allows an application program 110 written in a programming language such as COBOL, C++, FORTRAN, or other language to be translated into processor 104 readable code. After completion, the application 110 accesses and manipulates data stored in the memory 106 of the computer 102 using the relationships and logic that was generated using the compiler 112.

[0049] In one embodiment, instructions implementing the operating system 108, the computer program 110, and the compiler 112 are tangibly embodied in a computer-readable medium, e.g., data storage device, which could include one or more fixed or removable data storage devices, such as a zip drive, floppy disc drive 124, hard drive, CD-ROM drive, tape drive, etc. Further, the operating system 108 and the computer program 110 are comprised of instructions which, when read and executed by the computer 102, causes the computer 102 to perform the steps necessary to implement and/or use the present invention. Computer program 110 and/or operating instructions may also be tangibly embodied in memory 106 and/or data communications devices, thereby making a computer program product or article of manufacture according to the invention. As such, the terms “article of manufacture” and “computer program product” as used herein are intended to encompass a computer program accessible from any computer readable device or media.

[0050] In one embodiment, the computer 102 is communicatively coupled to a system 130 comprising one or more system elements which may include, for example, a remote computer 132A, a remote server 132B, or a test device or test interface 132C (collectively known hereinafter as system elements 132). Portions of the application program 110 may be executed by the system elements 132 as well as the computer 102, thus implementing a parallel processing structure. The application program 110 may also include a series of instructions to command one or more of the system elements 132.

[0051] Those skilled in the art will recognize many modifications may be made to this configuration without departing from the scope of the present invention. For example, those skilled in the art will recognize that any combination of the above components, or any number of different components, peripherals, and other devices, may be used with the present invention.

Overview

[0052]FIG. 2 is a flow chart presenting an overview of the process steps used to practice one embodiment of the present invention. First, the process begins by defining a source file 318 having a plurality of tags, as shown in block 202. Each tag is associated with a member of a library of executable code objects for performing a portion of an automatic test procedure for the system 130. The source file 318 is used to generate 204 a test plan 322. The test plan 322 is a document which, in conversational language, describes the test objectives, procedures, scenario, and other important information about the test case. The test plan 322 is usually published for review by a test review team. If test plan 322 is accepted, an automated test code is generated 206 from the source file 318.

[0053]FIG. 3 is a flow diagram providing additional detail regarding the operations described in FIG. 2. A source file 318 can be generated with the use of a test case GUI 312, or manually, by using a source file template 302 using any text editor. The process of generating a source file 318 from the source file template 302 is discussed below.

[0054]FIG. 4 is a diagram showing an illustrative embodiment of a template 302 for the script file 318. The source file template 302 provides the user with an organized list of the essential parts of the source file 318. The user can use the template 302 to enter the test case objectives, scenario, procedure, system configuration, and the parts used by the test case. After the source file 318 is completed it is used to generate a test plan 322 and test code 320 for the test case.

[0055] The template 400 comprises a plurality of tags 402-450 which are used to identify and delineate information entered into the source file 318. Tags 402, 406, 414, 422, 430, and 438 (denoted :h4) are header tags, indicating that the information that follows the tag (the characters ‘Objectives’, ‘Scenario’, ‘Procedure’, ‘Verification’, ‘System Configuration’ and ‘Parts Used by Test Case’) are associated with a fourth header level that will be printed in plaintext in the test plan 322. Tag 404 indicates that the information that follows will be printed as a text paragraph in the test plan 322. Tags 408, 416, and 424 indicate that the following items are part of an ordered list, and will be numbered. Tags 410, 418, 426, and 434 indicate that the information that follows is a line input. Tags 412, 420, 428, and 436 are end of tag indicators. The narrative of the objectives of the test are entered after tag 404. One or more line inputs or instructions are provided beginning at tag 410 to enter the test scenario. Similarly, information regarding the test procedures, verification, system configuration, and the parts used by the test case are entered after tags 416, 424, 432, and 438, respectively.

[0056]FIG. 5 is an example of a script file template 500 after the test purpose and the test scenario have been inserted into the source file 318 by the user. A narrative of the purpose of the test is depicted as 502, and the test scenario is specified by the plurality of lines shown as 504.

[0057] In addition to the test purpose and scenario, the user must enter a test procedure. This test procedure results in a series instructions to the system elements 132 being tested. The user may enter the test procedure by simply typing characters describing the appropriate system element commands in the script file or by using a test case graphical user interface 312 (GUI) described later in this disclosure. The test case GUI 312 essentially steps the user through the process of defining the test procedure by asking the user to select test options. The test case GUI 312 thus relieves the user of the need to remember the syntax and parameters for a large number of test procedure commands.

[0058]FIG. 6 is an example of a source file template 302 after a plurality of test procedure commands 602-616 have been inserted into the source file template 500. Each of the commands is associated with a tag 602A-616A and one or more tag parameters 602B-616B. Each of the tags for the test procedure commands 602A-616A is associated with a member of a library of executable code test objects 314, each of which is capable of performing an assigned function in support of the automated test procedure. For example, the :HPENTRY tag 602A and associated parameter 602B specify the configuration to be tested. The :HPLOAD tag 604A and associated parameters specify that the database under test is the ‘DJK’ database, which is to be implemented on a share level of three. Other tags 606A-616A and parameters 606B-616B also refer to specific test commands. The source file 318 is completed when all of the desired test procedure commands have been entered. Returning to FIG. 3, the test case source file 318 is now used to generate a test plan 322 via a QPRINT 321 or similar function. The test plan 322 is presents a conversational language description of the test case (including the objectives, scenario, procedures, etc.).

[0059]FIG. 7 is a flow chart showing an illustrative example of process steps used to generate the test plan 322 from the source file 318. In some cases, the tags in the source file 318 simply specify a print formatting (e.g. indentation and whether the text following the tag is a header, such as tags 402-450). Other tags, such as tags 602A-616A, are instead associated with the members of the library of executable test code objects 314. The first tag type can be interpreted and printed by a QPRINT function 321. However, the second tag type are not recognized by a QPRINT function 321, and must be identified and handled differently. These tags are interpreted, translated using script macros 325, and conversational language statements in for the test plan 322 are generated as shown in blocks 702 and 704. This is accomplished via script macros 325 such as the script macro having representative code instructions presented in FIGS. 30A and 30B. If tags are encountered that are uninterpretable (because, for instance, the user typed in the incorrect tag name, a tag not associated with one of the script macros 325, or an unsupported or out of range tag parameter), an error message (such as “+++”) noting this error is placed in the test plan 322 in the appropriate place.

[0060] The tags in the source file 318 are scanned to identify system elements 132 that are tested by the test case, and to generate a test index (the index is automatically generated) from the identified system elements 132. This gives the user an at-a-glance view of the scope and thoroughness of the test case.

[0061]FIGS. 8A and 8B are diagrams showing a test plan 322 generated from the source file shown in FIG. 6. Note that the QPRINT function 321 has interpreted the first tags to format the test plan 322 accordingly, and the script macros 325 have interpreted the second tags, and provide a conversational language depiction of the test procedures. Because the test plan 322 represents a conversational language description of what the test hopes to accomplish, what procedures it will use, and the test code, the test plan 322 can be published for review and comment. If any changes to the test are required, the user makes the necessary changes to the source file 318, and generates the test plan 322 anew. The test plan 322, too, can also be used to generate other special purpose files. For example, the test plan 322 can be processed by a HPINFO software module 323 to generate a test case information (info) file 324 that can provide test case background and other information. If necessary, additional software modules can process the source file 318 to generate test specifications and similar documentation.

[0062] After the test plan 322 has been approved, the next step is to generate test code 320 from the source file 318. This step is performed by an HPTC EXEC software module 319, which interprets the tags and associated tag parameters in the source file, and generates test code with links to the appropriate member of the library of executable code objects 314. In one embodiment, the generated automated test code 320 uses a screen-scraping technique wherein the commands to the system elements are provided via coded automated keystroke entries which are injected to the appropriate system element. An example of a portion of HPTC EXEC code used to translate a HPSRLM2 test object to test code is presented in FIG. 31. An example of the generated test code 320 translated from the HPSRLM2 test object is shown in FIG. 9F, at 910. An example of the subroutine that the test code line 910 calls is shown in FIGS. 32A-32C. This code resides in the automated executable subroutine library 327. Responsive messages from the system element are intercepted and used to determine whether the command proceeded normally, or if there was an error.

[0063] FIGS. 9A-9F are diagrams showing a listing of an automated test code 320 generated from the script file shown in FIG. 6. The listing begins in FIG. 9A with commented code (leading ‘/*’ characters denote code comments) describing the objectives, and scenario for the test case. The listing continues in FIG. 9B with additional information regarding the test case name, the source file, and other information. The remainder of FIG. 9B, as well as FIGS. 9C and 9D describe variable definitions for scenario variables and called commands. FIG. 9F presents the test code commands.

[0064] Returning to FIG. 3, once the test code has been generated, it can be executed 326. Using the screen-scraping technique described above, the commands are provided to the system elements 132, and response messages from the system elements 132 are used to determine the test result, and whether the test errors were reported. If no test errors were reported 328, the test results are provided to the user, and the test case has completed. If test errors are reported 328, they may be corrected by altering the test case source file 318, and regenerating the test plan 322 and the automated test code 320. One of the advantages provided by the present invention is the use of the source file 318 to automatically generate both the test plan 322 and the automated test code 320. When errors are detected in either the test plan 322 or the test code 320 (whether by executing the code or compiling the code), those errors can be corrected by making appropriate changes to the source file 318. Hence, the test code 320 is self-documenting, and there is no need for the user to go through the time-consuming (and often omitted) process of rewriting the test plan 322 to conform with actual test procedures.

[0065] The foregoing uses a source file having a plurality of tags which are associated with executable code test objects in the executable code test object library 314. Although the user of pre-defined test objects simplifies the generation of the test code 320, the user is still required to have adequate knowledge of the syntax and related parameters of the test procedure commands 602-606. Further, in many cases, the proper value for a particular test command is dependent upon a function and value selected in another portion of the test code. The present invention ameliorates this problem with a test case GUI 312, which operates with the computer GUI 118B. Referring again to FIG. 3, the test case GUI 312 assists the user in generating the source file 318 by presenting test case options 304 to the user, and accepting user input 210 selecting the appropriate options. The user options 304 are determined by one or more of a set of rules 306. User options may also be context-sensitive. That is, the options available to the user to perform a particular test function may be a dynamically determined according to a previously selected user input 210. The test case GUI 312, as described for fully herein, also permits the user to convert manually entered test case commands into test case objects, and to store them in the executable code test object library 314 for future use.

[0066]FIG. 10 is a flow chart presenting an overview of the operations used to generate a source file 318 using the test case GUI 312. First, a visual representation of the members of the library of executable code test objects 314 is presented to the user, as shown in block 1002. Then, the test case GUI 312 accepts 1004 a selection of a first test object in the visual representation. Test options for the first test object are then presented 1006 to the user for selection. The test options define test parameters for performing a portion of the automated test procedure. Then, the test case GUI 312 accepts user-selected first test object options, as shown in block 1008. The first test object options are translated into a tag and an associated tag parameter, which will ultimately be stored 1012 in the source file 318.

[0067]FIG. 11 is a diagram of a start-up window for the test case GUI 312. The start-up window comprises a plurality of tabs 1102, 1104, 1106, and 1108 for navigating the start-up window. The “new” tab 1102 allows the user to create a new test plan, the “existing” tab 1104 allows the user to edit and run an existing test plan or existing test case, the “recent” tab 1106 allows the user to view recently generated test plans or test cases, and the “tutorial” tab 1108 allows the user to participate in a tutorial on how to use the test case builder.

[0068]FIG. 12 is a diagram of one embodiment of the appearance of the test case GUI 312 after the user has elected to create a new test case. The test case GUI 312 now presents a test case information window 1202. The user is prompted to enter the test case name in a test case name field 1204, the objective of the test case in an test objective field 1206, and a description of the test case in a line-wrapped description field 1208. After entering the information, the user selects the “next” button 1210.

[0069]FIG. 13 is a diagram of the appearance of one embodiment of the test case GUI 312. Here, the test case GUI is prompting the user to enter the test case configuration with a “select configuration” window 1302. The user selects the desired processor configuration from the options presented in the “select configuration” window 1302. In the illustrated example, the user has selected a three processor configuration. When the user is satisfied with the configuration selection, the “next” button 1308 is selected. If the user would like to change an entry made in a previous window, the “back” button 1310 is selected.

[0070]FIG. 14 is a diagram showing an exemplary example of the test case GUI 312 prompting the user to enter a step-by-step scenario description. This is accomplished by presenting a “step-by-step” scenario description window 1402. The user enters a conversational language description of the scenario for the test case in the description field 1404. When completed, the user selects the “next” or “back” buttons, as described above. The foregoing operations complete the first phase of generating a the source file.

[0071]FIG. 15 is a diagram showing an example of how the test case GUI 312 prompts the test designer to enter an author name. A author field 1504 is provided in an “author name” window 1502. The test designer enters their name in the author name field 1502, and selects the “next” button 1506.

[0072]FIG. 16 is a diagram showing an exemplary test case GUI 312 prompting the user to select a test configuration. A “select configuration” 1602 window is presented to the user. The “select configuration” window 1602 comprises one or more data entry or option selection areas 1604-1610 to select from the available configuration options. In the illustrated example the user has selected a six computer configuration.

[0073]FIG. 17 is a diagram showing an exemplary test case GUI 312 prompting the user to select among RECON initialization options. Here, the test case GUI 312 comprises a “initialize RECON” window 1702, comprising a plurality of data entry or option selection controls 1704-1718. Since the user had previously selected a six computer configuration, computers one through six are listed in the radio button array 1704. The user can select the options for the computer they want to execute the object on by selecting the appropriate radio button from the array 1704, then entering or selecting the appropriate data for the remaining data entry components 1706-1718.

[0074]FIG. 18 is a diagram showing an exemplary test case GUI 312 prompting the user to select database types for the test case. Here, the GUI 312 includes a “select database types” window 1802, and input controls 1804 allowing the user to select the database type for the test case.

[0075]FIG. 19 is a diagram showing an exemplary test case GUI 312 prompting the user to select which databases to load for the test case. The user is presented with a “load database(s)” window 1902 comprising a selectable database list 1904, share level selection radio buttons 1906, and a drop box 1908 to specify the number of partitions for the selected database. The databases listed in the database list 1904 depend on the user's database type selection entered in the test case GUI 312 depicted in FIG. 18.

[0076]FIG. 20 is a diagram showing an exemplary test case GUI 312 prompting the user to select among IRLM options. The user is presented with a “Start IRLM” window 2002. The user can choose to start the IRLM on all of the computer configurations (CECs) or a group of computers that were specified in the “select configuration” window 1602, in which case the user may not specify any options, or can apply the IRLM options to an individual CEC as desired by selecting appropriate input areas. IRLM options such as the group, lock tab, IRLM ID, and IRLM name are selected with input components 2006. Once the user has completed entering the IRLM options, the user has completed the second phase of generating the test plan is complete.

[0077]FIG. 21 is a diagram showing an exemplary test case GUI 312 prompting the user to enter test procedure commands. The test case GUI 312 comprises a first window portion (or object toolbox) 2102 comprising a visual representation of the members of the executable code test object library 314 that can be used to create the source file 318, and a second window portion (or test case window) 2104 which provides a listing of the current source file 318. The member objects in the executable code test library are organized into alphabetized categories. The contents of each category can be examined by selecting the “+” icon 2108 adjacent the category of interest.

[0078]FIG. 22 is a diagram showing the test case GUI 312 after the user has selected the “+” icon 2108 to show the library member objects 2202 categorized under the coupling facility category 2106. The highlighted area indicates the current line, and new objects added to the test case are inserted after the current line. When the user selects any of the library member objects 2202, a window is opened to present parameter options for that library member object.

[0079]FIG. 23 is a diagram showing the test case GUI 312 after the user has selected the “CF Link Failure Recovery” library member object 2204 in FIG. 22. Here, a CFLINK window 2302 is displayed, presenting the user with the parameter options for CF Link Failure/Recovery. The CFLINK window 2302 includes an ON frame 2310 having input controls to select the configuration 2304, and an action frame 2306 having input controls to select whether failure or recover action should be taken. Note that since the HPENTRY is set to CONFIG=30, a single computer configuration has been selected, and only one CEC is displayed in the ON frame 2310. The object output text box 2308 shows the syntactical object and its parameter(s) that will be inserted into the test source 2104 after the highlighted line 2314

[0080]FIG. 24 is a diagram showing how the test case GUT 312 can be used to reverse-parse commands in the source file 318. Here, the user has selected the HPENTRY line 2206 by double clicking in the second window portion 2104 at the HPENTRY line 2206, opening HPENTRY object definition window 2402. The user can now change the HPENTRY test object parameters using the input controls provided. In the illustrated example, the user has selected a six-processor configuration (HPENTRY=12) in the select configuration input control 2404. These settings are accepted when the user selects the “add object” button 2406, and the HPENTRY line 2206 will be changed in the second window portion 2104 according to the object output 2408 being displayed.

[0081]FIG. 25 is a diagram showing the result of the reverse-parsing performed as illustrated in FIG. 24. Note that when the user selects the “CF Link Failure/Recovery” library member object 2204, the CFLINK window 2302 ON frame 2310 now identifies six processors in the configuration. Using the reverse parsing capability defined above, the user can directly edit the source file 318. The test case GUI 312 will reverse-parse the selected lines and present the available options to the user, to prevent erroneous input. The user can edit the source file 318 by selecting the edit object on the task bar and clicking on the edit mode.

[0082]FIG. 26 is a diagram showing another embodiment of the test case GUI 312. Here, the user has selected the terminals category 2602, showing library member objects 2604 including a “use a live terminal” library member object 2606, and has further selected the “use a live terminal” library member object 2606, thus opening a “Setup a live terminal” window 2606. The “Setup a live terminal” window 2606 presents an ON frame 2612, terminal option frame 2608, a terminal frame 2614 and a port frame 2616. The required input parameters for the live terminal library member object 2606 are highlighted by changing the color of the frame or the text labeling the frame. If the user enters a value in the combo box in the terminal option frame 2608, that value is saved for the duration of the test case development session. Tooltip box 2610 is applied to the ON frame 2612 to provide the user with context sensitive help.

[0083]FIG. 27 is a diagram showing the test case GUI 312 showing another embodiment of the “Set up a live terminal” window 2702. Here, the user has specified a single processor configuration, so the ON frame 2612 presents the option of only a single processor configuration. The window 2702 also shows that the user has entered data into the combo box in the terminal frame 2614 and into the combo box in the port frame 2616.

[0084]FIG. 28 is a diagram showing the test case GUI 312 after the user has selected an object in the source code 318 for reverse parsing. Here, the IRLM object selected by the highlight bar 2802 includes an invalid parameter (ON=AL), and the test case GUI 312 responds by presenting a pop-up window 2804 with an error message 2806 describing the error, and offering help.

[0085]FIG. 29 is a diagram showing the test case GUI 312 presenting an IRLM object window 2902. To open this window, the user clicked on the OK button on the pop-up window 2804. The IRLM object window 2902 presents an ON frame 2904, which is highlighted in red to indicate that the ON=parameter needs to be selected. The “add object” button 2906 remains unactivated until values for all of the required parameters are entered.

Conclusion

[0086] This concludes the description of the preferred embodiments of the present invention. In summary, the present invention describes a method, apparatus, and article of manufacture for generating test cases using a test object library.

[0087] The method comprises the steps of defining a source file having a plurality of tags associated with a member of a library of executable code objects defining a set of instructions for performing a portion of the automatic test procedure, generating a test plan in a conventional language from the source file, and generating an automated test code for the automated test procedure from the source file. In one embodiment, a test index identifying system elements tested by the test code is generated and incorporated into the test plan, allowing the user to verify that all desired system elements are exercised by the automated test code. Automated test code is generated using a technique wherein commands to the system elements are issued and messages responsive to the commands are intercepted and used to provide test status and error messages. The article of manufacture comprises a data storage device tangibly embodying instructions to perform the method steps described above.

[0088] The apparatus comprises means for defining a source file having a plurality of tags, wherein each tag is associated with a member of a library of executable code objects defining a set of instructions for performing a portion of an automatic test procedure, means for generating a test plan in a conversational language from the source file, and means for generating an automated test code for the automatic test procedure from the source file.

[0089] The present invention allows users to rapidly generate and debug self-documenting test cases. This is accomplished by providing the user with a library of test objects, each of which is associated with a tag. The user creates a source file using the tags to refer to the desired test objects. To further assist the user, a test case GUI is supplied that presents a visual representation of the test objects in the library and a listing of the source code. The user can compose the source code by selecting the proper location in the source code file, and selecting the appropriate test code object. The user is prompted to choose between a selection of test code object parameters, eliminating the possibility that the user will select test object parameters that do not exist or are out of range. The GUI's user prompts are also context-sensitive in that the options presented to the user can be a function of the test objects and parameter selections currently in the source code.

[0090] The present invention also provides a unified method of both generating the test code, and for generating conversational language documentation of the test code. This streamlines the test documentation process, and assures that the actual test procedures are consistent with the current test plan.

[0091] The foregoing description of the preferred embodiment of the invention has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Many modifications and variations are possible in light of the above teaching. It is intended that the scope of the invention be limited not by this detailed description, but rather by the claims appended hereto. The above specification, examples and data provide a complete description of the manufacture and use of the composition of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended. 

What is claimed is:
 1. A method of generating test code for an automated test procedure applyable to a system comprising a plurality of interconnected elements, the method comprising the steps of: defining a source file having a plurality of tags, each tag associated with a member of a library of executable code objects defining a set of instructions for performing a portion of the automatic test procedure; generating a test plan in a conversational language from the source file; and generating the test code for the automated test procedure from the source file.
 2. The method of claim 1, wherein the step of generating a test plan comprises the steps of: translating the tags; and generating a conversational language phrase for each translated tag.
 3. The method of claim 2, wherein the test plan comprises a test index identifying the system elements tested by the test code, the test index generated by performing the step of scanning the interpreted tags to identify the system elements tested by the test code.
 4. The method of claim 2, wherein the step of generating a test plan further comprises the steps of: identifying an uninterpretable tag in the test plan; and appending the test plan with an error message identifying the uninterpretable tag.
 5. The method of claim 1, wherein the library of executable code objects comprises a first executable code object defining a set of instructions for performing method steps comprising the steps of: issuing a command to a commanded system element; and intercepting a message responsive to the command from the commanded element.
 6. The method of claim 5, further comprising the step of: evaluating the message responsive to the command; and providing an error message according to the evaluated message.
 7. The method of claim 1, wherein the step of generating test code for the automated test procedure comprises the step of translating the executable code objects associated with the tag in the source file.
 8. An apparatus for generating test code for an automated test procedure applyable to a system comprising a plurality of interconnected elements, comprising: means for defining a source file having a plurality of tags, each tag associated with a member of a library of executable code objects defining a set of instructions for performing a portion of the automatic test procedure; means for generating a test plan in a conversational language from the source file; and means for generating the test code for the automated test procedure from the source file.
 9. The apparatus of claim 8, wherein the means for generating a test plan comprises: means for translating the tags; and means for generating a conversational language phrase for each translated tag.
 10. The apparatus of claim 9, wherein the test plan comprises a test index identifying the system elements tested by the test code, wherein the test index generated by performing the step of scanning the interpreted tags to identify the system elements tested by the test code.
 11. The apparatus of claim 7, wherein the means for generating a test plan further comprises: means for identifying an uninterpretable tag in the test plan; and means for appending the test plan with an error message identifying the uninterpretable tag.
 12. The apparatus of claim 8, wherein the library of executable code objects comprises a first executable code object comprising: means for issuing a command to a commanded system element; and means for intercepting a message responsive to the command from the commanded element.
 13. The apparatus of claim 12, further comprising: means for evaluating the message responsive to the command; and means for providing an error message according to the evaluated message.
 14. The apparatus of claim 8, wherein the means for generating test code for the automated test procedure comprises means for translating the executable code objects associated with the tag in the source file.
 15. A program storage device, readable by a computer, tangibly embodying at least one program of instructions executable by the computer to perform method steps of generating test code for an automated test procedure applyable to a system comprising a plurality of interconnected elements, the method comprising the steps of: defining a source file having a plurality of tags, each tag associated with a member of a library of executable code objects defining a set of instructions for performing a portion of the automatic test procedure; generating a test plan in a conversational language from the source file; and generating the test code for the automated test procedure from the source file.
 16. The program storage device of claim 15, wherein the method step of generating a test plan comprises the method steps of: translating the tags; and generating a conversational language phrase for each translated tag.
 17. The program storage device of claim 16, wherein the test plan comprises a test index identifying the system elements tested by the test code, the test index generated by performing the step of scanning the interpreted tags to identify the system elements tested by the test code.
 18. The program storage device of claim 16, wherein the step of generating a test plan further comprises the method steps of: identifying an uninterpretable tag in the test plan; and appending the test plan with an error message identifying the uninterpretable tag.
 19. The program storage device of claim 15, wherein the library of executable code objects comprises a first executable code object defining a set of instructions for performing method steps comprising the steps of: issuing a command to a commanded system element; and intercepting a message responsive to the command from the commanded element.
 20. The program storage device of claim 19, wherein the method steps further comprise the steps of: evaluating the message responsive to the command; and providing an error message according to the evaluated message.
 21. The program storage device of claim 15, wherein the method step of generating test code for the automated test procedure comprises the method step of translating the executable code objects associated with the tag in the source file. 